Water-soluble, water/oil repellent treating composition and method of making

ABSTRACT

The reaction product obtained by cohydrolysis and condensation of (A) a fluorinated alkyl-bearing alkoxysilane, (B) an amino-bearing alkoxysilane, and (C) an alkoxysilyl-bearing polyorganosiloxane is dissolved in water to provide a water-soluble, water/oil repellent treating composition. This water/oil repellent treating composition has improved water solubility and shelf stability, has no detrimental effects on the environment because of the aqueous system, and imparts fully durable water repellency and satisfactory softness and hand to textiles.

[0001] This invention relates to a water-soluble, water/oil repellenttreating composition which is used to treat substrates, especiallyfibrous items such as clothes, non-woven fabrics, rainwear, carpets,sofas, leather and paper, to impart all of water/oil repellency, stainproofing and softness thereto, and a method for preparing the same. Moreparticularly, it relates to such a water-soluble, water/oil repellenttreating composition with which substrates can be treated in a simplemanner without detrimental influence on the environment.

BACKGROUND OF THE INVENTION

[0002] Water repellent sprays are one class of convenient commoditycapable of imparting water repellency to fibrous items including clothesand leather. Typical water repellent sprays use fluoro-resins as therepellent. The solvent in which the repellent is dissolved has beenswitched from fluorocarbons to petroleum hydrocarbon solvents sinceenvironmental problems including ozone layer protection recently becameof great concern. However, the petroleum hydrocarbon solvents often giverise to problems like intoxication accidents of ordinary consumers. Itwould be desirable from the health and environment factors to have asafer water repellent spray which does not use organic solvents.

[0003] From this standpoint, Japanese Patent No. 2,960,304 proposes arepellent composition comprising a silicone acrylic graft copolymer as abase component and an alcoholic solvent. This composition, however, isnot so water repellent as the fluoro-resin systems and cannot impart oilrepellency. The solvent which is alcohol is low toxic, but is notcompletely odorless. Among aqueous systems, those of fluorinated acrylicpolymer emulsion type are often used. This emulsion has the problemsthat unreacted toxic monomer is often left after polymerization, andfibers treated therewith are less soft.

[0004] The inventors proposed in JP-A 9-249748 a fiber or fabrictreating agent which is water soluble, fully water/oil repellent and lowyellowing. Regrettably, when fibrous items are treated therewith, thesoftness which is requisite to fibrous items is sometimes impaired.

SUMMARY OF THE INVENTION

[0005] Therefore, an object of the invention is to provide awater-soluble, water/oil repellent treating composition which isdissolvable in water to clear the safety requirement, and possesseswater/oil repellency, stain proofing, softness, and storage stability.

[0006] It has been found that when the reaction product obtained bycohydrolysis and condensation of (A) a fluorinated alkyl-bearingalkoxysilane of the general formula (1) and/or a partial hydrolyzatethereof, (B) an amino-bearing alkoxysilane of the general formula (2)and/or a partial hydrolyzate thereof, and (C) an alkoxysilyl-bearingpolyorganosiloxane of the general formula (3) and/or a partialhydrolyzate thereof is used as an active ingredient in a water/oilrepellent treating composition (the formulae are defined below), thereis obtained a water-soluble, water/oil repellent treating composition.The reaction product is readily dissolvable in water because thefluorinated alkyl-bearing silane compound serving as a water repellentcomponent itself is endowed with water solubility. The compositionremains stable during shelf storage and imparts high water repellency,which remains durable after treatment. The alkoxysilyl-bearingpolyorganosiloxane can impart softness inherent to silicone. Aftertreatment with the composition, fiber surfaces are endowed withwater/oil repellency and softness. The inventive composition overcomesthe problems of prior art water/oil repellent agents. It has also beenfound that the cohydrolytic condensation reaction product can beprepared in a consistent and reliable manner by effecting (partial)cohydrolysis on components (A) and (C) to form a (partial)cohydrolysate, and effecting condensation reaction of the (partial)cohydrolysate with component (B).

[0007] According to one aspect, the invention provides a water-soluble,water/oil repellent treating composition comprising the reaction productobtained by cohydrolysis and condensation of (A) a fluorinatedalkyl-bearing alkoxysilane of the following general formula (1) and/or apartial hydrolyzate thereof, (B) an amino-bearing alkoxysilane of thefollowing general formula (2) and/or a partial hydrolyzate thereof, and(C) an alkoxysilyl-bearing polyorganosiloxane of the following generalformula (3) and/or a partial hydrolyzate thereof, the reaction productbeing dissolved in water.

[0008] Herein Rf is a perfluoroalkyl group represented by C_(n)F_(2n+1)or a perfluoropolyether group represented by

[0009] X is at least one linking group selected from among —CH₂—,—CH₂O—, —NR³—, —CO₂—, —CONR³—, —S—, —SO₃— and —SO₂NR³—, R¹ is an alkylgroup having 1 to 4 carbon atoms, R² is an alkyl group having 1 to 4carbon atoms, R³ is hydrogen or an alkyl group having 1 to 8 carbonatoms, “a” is an integer of 0 to 3, “b” is an integer of 1 to 3, “c” is0 or 1, n is an integer of 1 to 20, and m is an integer of at least 1.

[0010] Herein R³ and R⁴ each are independently hydrogen, an alkyl grouphaving 1 to 15 carbon atoms, or an aminoalkyl group having 1 to 15carbon atoms, R⁵ is a divalent hydrocarbon group having 1 to 18 carbonatoms, R⁶ is an alkyl group having 1 to 4 carbon atoms, R⁷ is an alkylgroup having 1 to 4 carbon atoms, and “d” is 0 or 1.

[0011] Herein R⁸ to R¹⁰ each are an alkyl group having 1 to 6 carbonatoms, R¹¹ is an oxygen atom or an alkylene group having 1 to 4 carbonatoms, and “e” is 0 to 50.

[0012] The composition is typically used in the treatment of fibrousitems for imparting water and oil repellency.

[0013] Another aspect of the invention provides a method for preparing awater-soluble, water repellent, oil repellent treating composition,comprising the steps of effecting (partial) cohydrolysis on components(A) and (C) to form a (partial) cohydrolysate, and effectingcondensation reaction of the (partial) cohydrolysate with component (B)to form the cohydrolytic condensation reaction product.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0014] Component (A) used herein is a fluorinated alkyl-bearingalkoxysilane of the general formula (1).

[0015] Herein Rf is a perfluoroalkyl group represented by C_(n)F_(2n+1)wherein n is an integer of 1 to 20, preferably 1 to 12, or aperfluoropolyether group represented by

[0016] wherein m is an integer of at least 1, preferably 1 to 20. X isat least one linking group selected from among —CH₂—, —CH₂O—, —NR³—,—CO₂—, —CONR³—, —S—, —SO₃— and —SO₂NR³—, wherein R³ is hydrogen or analkyl group having 1 to 8 carbon atoms. R¹ is an alkyl group having 1 to4 carbon atoms, R² is an alkyl group having 1 to 4 carbon atoms, thesubscript “a” is an integer of 0 to 3, “b” is an integer of 1 to 3, and“c” is 0 or 1.

[0017] Rf stands for perfluoroalkyl groups which may contain at leastone ether bond, of which perfluoropolyether groups are exemplifiedbelow.

[0018] Illustrative, non-limiting, examples of the silane of formula (1)are given below.

[0019] CF₃C₂H₄Si(OCH₃)₃

[0020] CF₃C₂H₄Si (OC₂H₅)₃

[0021] C₄F₉C₂H₄Si(OCH₃)₃

[0022] C₄F₉C₂H₄Si (OC₂H₅)₃

[0023] C₈F₁₇C₂H₄Si(OCH₃)₃

[0024] C₈F₁₇C₂H₄Si (OC₂H₅)₃

[0025] CF₃C₃H₆Si(OCH₃)₃

[0026] CF₃C₃H₆Si (OC₂H₅)₃

[0027] C₄F₉C₃H₆Si (OCH₃)₃

[0028] C₄F₉C₃H₆Si (OC₂H₅)₃

[0029] C₈F₁₇C₃H₆Si(OCH₃)₃

[0030] C₈F₁₇C₃H₆Si (OC₂H₅)₃

[0031] C₈F₁₇CONHC₂H₄Si(OCH₃)₃

[0032] C₈F₁₇CONHC₂H₄Si(OC₂H₅)₃

[0033] Of the above-illustrated compounds, C₈F₁₇C₂H₄Si(OCH₃)₃ andC₈F₁₇C₃H₆Si(OCH₃)₃ are especially preferred.

[0034] As component (A), a partial hydrolyzate of the silane may be usedas well as the silane. The hydrolyzate must have at least onehydrolyzable group left therein. If desired, component (A) may be eithera mixture of silanes or a hydrolyzate of mixed silanes.

[0035] Component (C) is an alkoxysilyl-bearing polyorganosiloxane of thefollowing general formula (3).

[0036] Herein R⁸ to R¹⁰ each are an alkyl group having 1 to 6 carbonatoms, R¹¹ is an oxygen atom or an alkylene group having 1 to 4 carbonatoms, and “e” is 0 to 50, preferably 5 to 20.

[0037] Illustrative, non-limiting, examples of the polyorganosiloxane offormula (3) are given below.

[0038] Of the above-illustrated compounds, the following is mostpreferred.

[0039] As component (C), a partial hydrolyzate of the polyorganosiloxanemay be used as well as the polyorganosiloxane.

[0040] Component (B) is an amino-bearing alkoxysilane of the followinggeneral formula (2).

[0041] Herein R³ and R⁴ each are hydrogen, an alkyl group having 1 to 15carbon atoms, especially 1 to 4 carbon atoms, or an aminoalkyl grouphaving 1 to 15 carbon atoms, especially 1 to 4 carbon atoms, R³ and R⁴may be the same or different; R⁵ is a divalent hydrocarbon group having1 to 18 carbon atoms; R⁶ is an alkyl group having 1 to 4 carbon atoms;R⁷ is an alkyl group having 1 to 4 carbon atoms; and “d” is 0 or 1.

[0042] Illustrative, non-limiting, examples of the amino-bearingalkoxysilane of formula (2) are given below.

[0043] H₂N(CH₂)₂Si(OCH₃)₃

[0044] H₂N(CH₂)₂Si(OC₂H₅)₃

[0045] CH₃NH(CH₂)₂Si(OCH₃)₃

[0046] CH₃NH(CH₂)₂Si(OC₂H₅)₃

[0047] H₂N(CH₂)₂SiCH₃(OCH₃)₂

[0048] H₂N(CH₂)₂SiCH₃(OC₂H₅)₂

[0049] CH₃NH(CH₂)₂SiCH₃(OCH₃)₂

[0050] CH₃NH(CH₂)₂SiCH₃(OC₂H₅)₂

[0051] H₂N(CH₂)₃Si(OCH₃)₃

[0052] H₂N(CH₂)₃Si(OC₂H₅)₃

[0053] CH₃NH(CH₂)₃Si(OCH₃)₃

[0054] CH₃NH(CH₂)₃Si(OC₂H₅)₃

[0055] H₂N(CH₂)₃SiCH₃(OCH₃)₂

[0056] H₂N(CH₂)₃SiCH₃(OC₂H₅)₂

[0057] CH₃NH (CH₂)₃SiCH₃(OCH₃)₂

[0058] CH₃NH(CH₂)₃SiCH₃(OC₂H₅)₂

[0059] H₂N(CH₂)₂NH(CH₂)₃Si(OCH₃)₃

[0060] H₂N(CH₂)₂NH(CH₂)₃Si(OC₂H₅)₃

[0061] CH₃NH(CH₂)₂NH(CH₂)₃Si(OCH₃)₃

[0062] CH₃NH(CH₂)₂NH(CH₂)₃Si(OC₂H₅)₃

[0063] H₂N(CH₂)₂NH(CH₂)₃SiCH₃(OCH₃)₂

[0064] H₂N(CH₂)₂NH(CH₂)₃SiCH₃(OC₂H₅)₂

[0065] CH₃NH(CH₂)₂NH(CH₂)₃SiCH₃(OCH₃)₂

[0066] CH₃NH(CH₂)₂NH(CH₂)₃SiCH₃(OC₂H₅)₂

[0067] Of the above-illustrated compounds, H₂N(CH₂)₃Si(OCH₃)_(3 H)₂N(CH₂)₃SiCH₃(OCH₃)₂ and H₂N(CH₂)₂NH(CH₂)₃Si(OCH₃)₃ are most preferred.

[0068] As component (B), a partial hydrolyzate of the alkoxysilane maybe used as well as the alkoxysilane.

[0069] The water-soluble, water/oil repellent treating composition ofthe invention is defined as comprising the cohydrolytic condensationreaction product of the above-described components (A), (B) and (C) as amain ingredient, the reaction product being dissolved in water.

[0070] The reaction product of components (A), (B) and (C) can beobtained by subjecting components (A), (B) and (C) to cohydrolyticcondensation, preferably in the presence of an organic or inorganicacid. It is preferred from the stability standpoint to obtain thereaction product by first effecting partial cohydrolysis on components(A) and (C) in the presence of an organic or inorganic acid to form apartial cohydrolysate, and effecting condensation reaction of thepartial cohydrolysate with component (B).

[0071] Examples of the organic and inorganic acids which are used uponcohydrolysis of components (A) and (C) include hydrochloric acid,sulfuric acid, methanesulfonic acid, formic acid, acetic acid, propionicacid, citric acid, palmitic acid, stearic acid, oleic acid, malonicacid, succinic acid, glutaric acid, oxalic acid, and maleic acid, aloneor in admixture of any. Of these, acetic acid and propionic acid areespecially preferred. An appropriate amount of the acid used is about 5to 400 parts, especially about 10 to 350 parts by weight per 100 partsby weight of components (A) and (C) combined. With less than 5 parts ofthe acid, hydrolysis may proceed slowly and the cohydrolyzate may becomeless stable in aqueous solution form. Preferably the amount of the acidcatalyst is adjusted so as to form a solution at pH 7 to 3 whendissolved in water.

[0072] Cohydrolysis is preferably carried out in a diluted form with asolvent. Suitable solvents are alcohol solvents such as methanol,ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 3-butanol and2-methyl-2-butanol, with 3-butanol being most preferred. An appropriateamount of the solvent used is about 100 to 500 parts, especially about200 to 400 parts by weight per 100 parts by weight of components (A) and(C) combined. Less than 100 parts of the solvent may allow condensationto proceed whereas more than 500 parts of the solvent may require anextra time for hydrolysis.

[0073] The molar amount of water added for cohydrolysis of components(A) and (C) is 1 to 3 times, especially 1.25 to 2.5 times the molaramount of components (A) and (C) combined. If the molar amount of wateris less than the molar amount of components (A) and (C) combined, morealkoxy groups may be left. If the molar amount of water is more than 3times, condensation may take place to an excessive extent.

[0074] Preferred reaction conditions for cohydrolysis of components (A)and (C) include a temperature of about 10 to 100° C., preferably about60 to 90° C. and a time of about 1 to 3 hours.

[0075] With respect to the mixing proportion, 100 parts by weight ofcomponent (A) is preferably mixed with 0.1 to 10 parts, especially 0.5to 3 parts by weight of component (C). Less than 0.1 part of component(C) may adversely affect durability and softness whereas more than 10parts of component (C) may adversely affect water solubility and oilrepellency.

[0076] Upon cohydrolysis of components (A) and (C), the molar ratio ofcomponent (A) to (C) is preferably set between 1:0.001 and 1:0.1,especially between 1:0.01 and 1:0.05 although this ratio variesdepending on the particular structures of components (A) and (C).

[0077] The reaction product obtained by cohydrolysis of components (A)and (C) is then continuously subjected to condensation reaction withcomponent (B). In this step, component (B) is reacted in such an amountthat the molar ratio of the total of components (A) and (C) to component(B) may fall between 1:0.5 and 1:20, especially between 1:1 and 1:10. Ifthe molar ratio of component (B) is less than 0.5, water solubility maybe adversely affected. If the molar ratio of component (B) is more than20, water repellency may be adversely affected and fibers treated becomemarkedly discolored.

[0078] Preferred reaction conditions for condensation of component (B)include a temperature of about 60 to 100° C. and a time of about 1 to 3hours.

[0079] In the water-soluble, water/oil repellent treating composition ofthe invention, the reaction product of components (A) to (C) is presentas a main or active ingredient. On use, the reaction product ispreferably diluted with water such that the concentration of thereaction product is 0.1 to 10%, especially 1 to 3% by weight, that is,the concentration of water is 99.9 to 90%, especially 99 to 97% byweight. If the concentration of water exceeds 99.9% by weight, thecomposition may fail to exert its essential performance and a largeamount thereof may have to be applied. If the concentration of waterless than 90% by weight, storage stability may be deteriorated.

[0080] To the water-soluble, water/oil repellent treating composition,an amino-modified silicone emulsion or an epoxy-modified siliconeemulsion or both may be added for the purpose of imparting softness andimproving hand. While it is known to apply an amino- or epoxy-modifiedsilicone emulsion to fibers for softness and hand improvements, theaddition of such an emulsion to the water-soluble, water/oil repellenttreating composition of the invention can also achieve softness and handimprovements. An appropriate amount of the amino- or epoxy-modifiedsilicone emulsion is 0 to 200 parts, especially 50 to 100 parts byweight per 100 parts by weight of the reaction product of components(A), (B) and (C). More than 200 parts of the amino- or epoxy-modifiedsilicone emulsion is undesirable because such a large amount improvessoftness, but adversely affects water/oil repellency.

[0081] Further, well-known additives such as surfactants and alcoholsmay be added for improving the stability of the aqueous solution insofaras this does not compromise the benefits of the invention. Curingcatalysts based on metals such as Al, Sn and Zn may also be added ifdesired.

[0082] The water-soluble, water/oil repellent treating composition thusobtained can impart satisfactory water/oil repellency and softness toitems of natural or synthetic fibers, textiles, lather and paper througha simple process, for example, by applying the composition to the itemin a conventional manner as by dipping or spray coating, followed bydrying. The composition is especially effective to apply to fibrousitems although it is also applicable to other substrates such as glass,metals and plastics.

[0083] The water-soluble, water/oil repellent treating composition ofthe invention has improved water solubility and shelf stability becausethe fluorinated alkyl-bearing silane compound serving as a maincomponent thereof is endowed with water solubility. The composition isaqueous and therefore, has no detrimental effects on the environment,and it imparts fully durable water repellency and good softness andhand. According to the inventive method, the reaction product serving asthe main ingredient can be produced in a consistent manner.

EXAMPLE

[0084] Examples of the invention are given below by way of illustrationand not by way of limitation.

[0085] Synthesis Example 1 (used in Example 1)

[0086] A 1-liter four-necked flask equipped with a stirrer, condenser,thermometer and dropping funnel was charged with 49.5 g (0.087 mol) ofC₈F₁₇(CH₂)₂Si(OCH₃)₃, 1.0 g (0.0010 mol) of(CH₃)₃SiO(Si(CH₃)₂O)₉Si(OCH₃)₃, 171.2 g of 3-butanol, 8.7 g (0.145 mol)of acetic acid and 2.6 g (0.14 mol) of water, which were stirred andheated until 3-butanol started refluxing. Reaction was continued at thetemperature for 2 hours, after which 17.2 g (0.0096 mol) ofNH₂(CH₂)₃Si(OCH₃)₃ was added dropwise from the dropping funnel. Underrefluxing of 3-butanol, reaction was continued for one hour, yielding acolorless clear solution.

[0087] Synthesis Example 2 (used in Example 2)

[0088] A colorless clear solution was obtained by repeating the reactionprocedure of Synthesis Example 1 except that the amount of(CH₃)₃SiO(Si(CH₃)₂O)₉Si(OCH₃)₃ was changed from 1.0 g to 1.5 g (0.0017mol).

[0089] Synthesis Example 3 (used in Example 3)

[0090] The solution obtained in Synthesis Example 1 was diluted withwater to form an aqueous solution containing 2% by weight of the activeingredient. An amino-modified silicone emulsion Polon MF-14EC (Shin-EtsuChemical Co., Ltd.) was diluted with water to form an aqueous solutioncontaining 2% by weight of the active ingredient. 100 g of the formersolution and 100 g of the latter solution were combined and stirred atroom temperature for 10 minutes, obtaining 195 g of an aqueous solutioncontaining 2% by weight of the active ingredients which looked colorlessand faintly turbid.

[0091] Synthesis Example 4 (comparison)

[0092] A 1-liter four-necked flask equipped with a stirrer, condenser,thermometer and dropping funnel was charged with 115 g (0.202 mol) ofC₈F₁₇(CH₂)₂Si(OCH₃)₃, 2.4 g (0.020 mol) of (CH₃)₂Si(OCH₃)₂, 400 g of3-butanol, 12.2 g (0.202 mol) of acetic acid and 5.4 g (0.3 mol) ofwater, which were stirred and heated until 3-butanol started refluxing.Reaction was continued at the temperature for 2 hours, after which 36.2g (0.202 mol) of NH₂(CH₂)₃Si(OCH₃)₃ was added dropwise from the droppingfunnel. Under refluxing of 3-butanol, reaction was continued for onehour, after which 47.6 g (0.202 mol) ofγ-glycidoxypropyltrimethoxysilane was added dropwise from the droppingfunnel. Under refluxing of 3-butanol, reaction was continued for onehour, yielding a pale yellow clear solution.

EXAMPLES 1-3 Comparative Example

[0093] Water-soluble fiber treating compositions (Examples 1, 2, 3 andComparative Example) were prepared by diluting the products of SynthesisExamples 1 to 4 so as to give an active ingredient concentration of 2%by weight, respectively. These water-soluble fiber treating compositionswere allowed to stand for one month at room temperature, and theyremained unchanged.

[0094] Each of these treating compositions was sprayed to pieces ofpolyester fiber taffeta, nylon taffeta and cotton broadcloth and airdried for one day. On the treated samples, a spray type water repellenttest and an oil repellent test were carried out. Contact angle withwater and hexadecane were measured. The treated samples were furtherexamined for hand. The results are shown in Tables 1 to 4.

[0095] Water repellent test

[0096] According to the spray method of JIS L 1092 (1986), water wassprayed to the surface of the treated sample. Water repellency was ratedfrom the surface state. Point Surface state  0 Surface and undersurfacewere entirely wetted  5 only surface was entirely wetted 70 half ofsurface was wetted, discrete water droplets penetrated the fabric 80surface was wetted with discrete water droplets 90 no surface wettingwas observed, but water droplets adhered 100  no surface wetting, nowater droplets adhered

[0097] Oil repellent test

[0098] According to AATCC Test Method 118 (1966), drops with a diameterof about 4 mm of liquid hydrocarbons having different surface tensions(ST) were placed on the surface of the treated sample at threepositions, using a dropping pipette. Oil repellency was rated from thepenetrated state after 30 seconds. Oil repellency Penetrated state 8n-heptane (ST 20.0 dyn/cm) did not penetrate 7 n-octane (ST 21.8 dyn/cm)did not penetrate 6 n-decane (ST 23.5 dyn/cm) did not penetrate 5n-dodecane (ST 25.0 dyn/cm) did not penetrate 4 n-tetradecane (ST 26.7dyn/cm) did not penetrate 3 n-hexadecane (ST 27.3 dyn/cm) did notpenetrate 2 n-hexadecane/nujol 35/65 (wt %) mixture (ST 29.6 dyn/cm) didnot penetrate 1 nujol (ST 31.2 dyn/cm) did not penetrate 0 below oilrepellency 1

[0099] Contact angle measurement

[0100] Contact angle with water and hexadecane were measured.Measurement was done at five different positions on the sample surface.An average of three measurements with maximum and minimum values omittedis reported.

[0101] Hand test

[0102] A panel of five persons touched the treated fabric with fingersand judged the hand according to the following criterion.

[0103] Good: equal hand to untreated fabric

[0104] Fair: somewhat harder hand than untreated fabric

[0105] Hard: harder hand than untreated fabric TABLE 1 Water repellencyPolyester fiber Nylon Cotton taffeta taffeta broadcloth Example 1 100100 100 Example 2 100 100 100 Example 3 100 100 100 Comparative Example100 100 100

[0106] TABLE 2 Oil repellency Polyester fiber Nylon Cotton taffetataffeta broadcloth Example 1 6 5 6 Example 2 5 5 6 Example 3 5 5 5Comparative Example 5 5 7

[0107] TABLE 3 Contact angle with water Contact angle Poly- withhexadecane ester Cotton Polyester Cotton fiber Nylon broad- fiber Nylonbroad- taffeta taffeta cloth taffeta taffeta cloth Example 1 124° 125°141° 95° 88° 115° Example 2 126° 120° 143° 88° 85° 110° Example 3 118°120° 123° 85° 83° 108° Comparative 125° 123° 147° 90° 89° 120° Example

[0108] TABLE 4 Hand Polyester fiber Nylon Cotton taffeta taffetabroadcloth Example 1 Good Good Fair Example 2 Good Good Good Example 3Good Good Good Comparative Example Hard Hard Hard

[0109] Additionally, each of the treating solutions was sprayed to apiece of polyester fiber taffeta, and dried by heating at 100° C. for 2minutes and at 150° C. for a further 2 minutes. The thus treated fabricwas examined for durability of water repellency by the following test.The results are shown in Table 5.

[0110] Durability of water repellency test

[0111] The treated fabric was placed in a wash bath containing 5 g ofsodium alkylbenzenesulfonate and 2 g of sodium carbonate per liter ofwater. A household washing machine was operated at a bath ratio of1:100, the fabric was washed for 15 minutes at a water temperature of50° C. The spray type water repellent test was carried out on the washedfabric. TABLE 5 Drying after Number of washing cycles spraying 0 1 2 3 45 Example 1 Air drying 100 100 100 100 100 100 Heat drying 100 100 100100 100 100 Example 2 Air drying 100 100 100 100 100 100 Heat drying 100100 100 100 100 100 Example 3 Air drying 100 100 100 100 100 100 Heatdrying 100 100 100 100 100 100 Comparative Air drying 100 100 100 100100 100 Example Heat drying 100 100 100 100 100 100

[0112] Japanese Patent Application No. 2000-390204 is incorporatedherein by reference.

[0113] Although some preferred embodiments have been described, manymodifications and variations may be made thereto in light of the aboveteachings. It is therefore to be understood that the invention may bepracticed otherwise than as specifically described without departingfrom the scope of the appended claims.

1. A water-soluble, water/oil repellent treating composition comprisingthe reaction product obtained by cohydrolysis and condensation of (A) afluorinated alkyl-bearing alkoxysilane of the following general formula(1) or a partial hydrolyzate thereof or both,

wherein Rf is a perfluoroalkyl group represented by C_(n)F_(2n+1) or aperfluoropolyether group represented by

X is at least one linking group selected from the group consisting of—CH₂—, —CH₂O—, —NR³—, —CO₂—, —CONR³—, —S—, —SO₃— and —SO₂NR³—, R¹ is analkyl group having 1 to 4 carbon atoms, R² is an alkyl group having 1 to4 carbon atoms, R³ is hydrogen or an alkyl group having 1 to 8 carbonatoms, “a” is an integer of 0 to 3, “b” is an integer of 1 to 3, “c” is0 or 1, n is an integer of 1 to 20, and m is an integer of at least 1,(B) an amino-bearing alkoxysilane of the following general formula (2)or a partial hydrolyzate thereof or both,

wherein R³ and R⁴ each are independently hydrogen, an alkyl group having1 to 15 carbon atoms, or an aminoalkyl group having 1 to 15 carbonatoms, R⁵ is a divalent hydrocarbon group having 1 to 18 carbon atoms,R⁶ is an alkyl group having 1 to 4 carbon atoms, R⁷ is an alkyl grouphaving 1 to 4 carbon atoms, and “d” is 0 or 1, and (C) analkoxysilyl-bearing polyorganosiloxane of the following general formula(3) or a partial hydrolyzate thereof or both,

wherein R⁸ to R¹⁰ each are an alkyl group having 1 to 6 carbon atoms,R¹¹ is an oxygen atom or an alkylene group having 1 to 4 carbon atoms,and “e” is 0 to 50, the reaction product being dissolved in water. 2.The composition of claim 1, further comprising an amino-modifiedsilicone emulsion or an epoxy-modified silicone emulsion or both.
 3. Thecomposition of claim 1 for use in the treatment of fibrous items forimparting water and oil repellency.
 4. A method for preparing awater-soluble, water/oil repellent treating composition, said methodcomprising the steps of effecting (partial) cohydrolysis on components(A) and (C) to form a (partial) cohydrolysate, and effectingcondensation reaction of the (partial) cohydrolysate with component (B)to form the cohydrolytic condensation reaction product of claim 1.